Electric safety-lamp.



B. GHRISTIANSEN.

ELECTRIC SAFETY LAMP.

APPLIGATION FILED 1211.4, 1911.

Patente Aug. 1,1911.

B. CHRISTIANSEN.

ELEGTRIG SAFETY LAMP.

APPLICATION FILED APR. 4, 1911.

Patented Aug. 1, 1911.

www.

3 SHEETS-SHEET 3.

a, .l l

L descent'la1np,-While in its turned-down .posi- UmTED Vsir-Atras PATENT ormon- 'BRUNo-cHmsfrrANsEm oF oLoGNE-sLz. GERMANY.

To all. 'w7wm 'itimayy concern:` A

, Be 1t 'known that- I, BRUNOCHRIST'IANSEN," a 4subject of the King. o'f Prussia, residing at VZlpich'erstrasse 199, Cologne-Slmin thev Empire of'Germany, have invented a new and aiseful'E ectric Safety-Lamp, of which the v'follovv'/g is a specification.

VMy inventlon relates to 'improvements in electric' safety-lamps to be carried in rooms which under circumstances-may be filled up with an explosible'm'ixture of gases, and the 'v -improvements. have for their .object to pro- Y' tect the lampxfrom short-circuits or sparking due to defects'in the current conductors or 1n consequence of any carelessness of the carrier.

otherwise might produce short-circuits.

vention with 'reference ,to the drawingsf in -Which- Anotherimprovement consist-s inso arranging the handle, that in its vertical position during use it prevents the-removal of the protecting glass-bell covering the 'incantion the Vhandle permits to take oftthe protecting glass-bell. I p

'A further improvement consists in providing thehandle with. a cross bar byfmeans of Which'it ,on being, turned up into the verf tical position can press the covervvith the frame on the upper edge of the box, vvhere the storage. battery is located. y

I' will now proceed to. describe my inaccompanying Figure 1 is an elevation of the improved electric safety-lamp, parts. being shown in section, Fig. '2L `shows a modiiication of a partin Fig. 1, Fig. 3 is a' side view of theA electric, safety-lamp shown at Fig. 1, Fig. 4

isa part out of Fig.A 1 and'shovvs-means for preventing the removal of the protecting glass-bell, Fig.; 5 corresponds to Fig. 3 and shows a modification of the meansV for preventing vthe removal of the protect-ing glassbell, and Fig. 6 correspondstoFig. 4 and shows the modified securing-means.

Similar characters of reference refer to similar parts throughout the several views.

The electric safety-lamp comprises a box 18 vwith t-Wo opposite pins 20, 20, on which a U-shaped-handle V19- can be turned upward into the vert-ical position shown, if the lamp is to'be carried about.' -In the box 1f a ELEoTResArErY-LAMP.

i Specification of Letters-Patent.' Patented Allg. 1, 1911. Application ala' April 4,. 1911.

seal' No. 618,796.

tioncan be disposed, which is shown to have one pole 36 in the'center above. 'Avconf tact spring 2 (Fig. l)l may be fastened -on the handle being turned upward into the.,

vertical position, whereby the cover 23 is Ises lstonagebattery 35 of. any known construc-4 cured on the boxl 18. then the handle 19.

is turned to a side downward, its crossbar 22 vWillrelease the spring 24, which can be seized for taking off the covers23. The contact spring 2 is shown to have a bent yrear arm 38, Which-isadapted to bear from below against the cover .23 for preventing the storage battery 3 5ffr`om shaking.during the transport. A"However, this is immaterial to my invention. l

On the cover 23 are fastenedtwo parallel supports 8 and 28 (Figli, the upper ends of vwhich form bearings for the -pivots 31 and 40 of al crosshead 39. This crosshead is made in one with a circular Hanged disk 26 'and Withja socket 7 for the incandescent lamp 41, which latter may be provided with a reflector 4 2. A.l'langed ring 25 (Fig. 4)

'carrying a lprotecting glass-bell 43 of anyv known construction fits the flange of the disk 26 and the two parts 25 and 26 are connected together by means of several bayonet-catches 44. A vertical bolt 2T is guided in two opposite holes in the ring 25 and in the disk 26 (Fig. 4) and may be provided with a collar 27 or the like "for preventing it from getting lost. lA lug 29 is provided on the support28 and as long as the head of the bolt 27 -below-bears on'the lug 29, the

bolt 27 will engage both the disk 26 and the ring 25 and prevent their relative displacement, 'so that the protecting lglass-bell 43 in its upper position shown at Fig. 3 can not be taken off. One side part of the handle 19 is provided with a lug 30. which L for 'the vertical position shown' of the handle 19. engages beneath 'the lug 29. From an examination of Fig. 3 it Will be evident that in the vertical position of the handle 19 its lug 30 will also prevent the holt 27 from longitudinal motion. if the protecting glass-bell 43 lwith the incandescent lamp 41 is turned downward into a position indicated by the dotted' lines. The incandescentlamp 41 is Vto be' insertedin circuit byturning. it rom. the upper position shownfin' full-lines to 'l `the .other .extreme-,position indicated. by', n dotted lines-and in the following mannergl j One-support 8 is made-hollowand in this'v hole a1-tube of ill'Slllating. material. is se-' curedkA metallic Vbolt-3 is longitudinally v-guindefd in the tube" 4 and has' af collar 3-",i which can bear on theone hand against the lowery end face of the tube 4 "and on'the 'othervhand against thel shoulder of v'a cap 9A (Fig. 2) screwedon they lower projecting.' Vfend of the tube .4. The contact spring. 2 alj-V -Lrealdy mentioned above is adaptedv t o bear b'olt 3. The upper end 'of the bolt 3may be reduced in diameter, .as isshown at Fig. 1, 'although thisl iis not absolutely ',necessary." For the left part in' Fig. ltlie .crosshead 39 Z-Q-isbored `init-s axis, and inthis bore a tube "6 of-insulating material issecured. vIn the tube '6 is fastened a shat'45 which. carries acam 5.' 'The shaft 45 is tojbe placed'in "permanent electric connection with one ,ter-

a5 l tion with thel other pole of the storagebatlamp 41 is put in permanent electric connecf tery 35 by means of the support28 in. any

vknown manner, which I do not describe here,

1 as it is'immaterial'to my invention.

'4.5. i f inclined face or the like for forcibly pushing the bolt 46 back. and thus releasing the Where so preferred, aA spring-pressed bolt 46 1) may be provided in either .side

' part of thef-handle-19 and be 'adapted to' ene' gage -in some part 47 on 'thecover 23 for securing the handleA 19 in itsvertical peni; tion.'v The part 47 may'beprovided 'with an handle 19 on the latter being forced downward in one direction. v may be secured in its vertical position by a pin passed through a'hole 21 (-Fig. 3).and

l .the corresponding hole of a lug 48 on the box 18'or.in any other known manner.

- If so preferred, the bolt. 3 in Fig. 3 may y be replaced by two parts 12 and 13- (Fig. 2) guided in the. tube 4 and pressed apart by means lo f a helical' spring 14. inserted between them and .surrounding la bolt 1,5 made in one withVA the part 12 vand guided in a .6l

snugly littin'g holel of the other part 13. By the bolt 15 `the two parts 12 and 13 are kept .in permanent electric connection. The contact' spring 2 in Fig. l' may be replaced by a Contact piece 16 disposed on the Stor* age battery and insulated therefrom, while Or vthe handle 19- seems vit is electricallyconnectedby-la spring the'like withone pole which'corresponds' to 36 :in Fig-1,v The bolt 27; inFig'4 servj4 ,ing for-l preventing the relative displace-' ment ofthepartsQ and-25 maybe replacedby a 'device/illustrated?.at= Figs.` i-'nand '6.j .Here the supporty 28 .is-provided'Iwithialug.' *50, on which afcap '33"is fastened: vThis 'cap' ispprovided withafrertical lflange 34, `againstl which thej'handle 19 in"its"vertical position made-to, engage, which has" a reduced perf` tion', atits end forengaging -in a" hole 'in the .disk 26". v'Ihe`cap normally-covers 'the- .screw 32'for:any. position-'of 'the-incandescent lamp 41'and 'the protectingglass-bell screwy as long as'the handle 19 remains' in its -vertical position. When, however, the

handle? 19 is turned' to the lett in Fig. 5"

and downward, it will be possible to so turn .fthe-.protecting glassbell 43 in the same' diL Lrec'tiomthat: the screw 32. leaves thev capl 33 and vcan; be longitudinally moved for withdrawing its reduced endfrom .the hole in 'the disk 26, or it may be taken' ohv altogether `Then it will be possible to dis# place" the ring 25 with regard lto the disk" 26 'and' to take yoli the protecting glass-l benis.

The electric safety-lamp describedland shown can be varied in .many respects without vdeparting .vention I claimf i 1. 'In an'electric .safety-lamp, the combifrom Ythe spirit of my invnation with a boX,'of a storage battery. in

said box, two supports on said box, one hollow and the other solid and electrically connected with one pole of said vstorage battery,

.a crosshead'turnable in saidtwo supports, an

incandescent lamp insaid cros'shead and having its one terminal-electrically connected by` said crosshead with said solid support,

aconductor longitudinally movable in and insulated from saidhollow support andelectrically connected with .the other pole of said storage battery, a second conductor in said 4crosshead insulated therefrom and elec- ,I i'

-trically connected with the other terminal .of

said incandescent lamp,l and a camon said i second conductor adapted -to depress and release said conductor on said cross'head with said incandescent y. lamp being turned jin either direction. l

2. ln anv electric' safetylamp, the combination withl a box, .of a storage batteryfin e said box, two supportson 'said box, one hollow and the' other-solid 'and electrically con' nected -"with onev pole of said ystorage battery, a crosshead turnable in said two supports, an incandescent lamp in said crosshead and having its one terminal electrically connected by said crosshe'adwithsaid solidsupport,

a first conductor in 'said hollow support 1ntherefroin'andj connected 'l writ-,fh 'the other pole 'of said -storagebatteI-y,

a 'econd. condiictor longitdinally; 'movable i A-Yinnsaid hollowjsupport 'and insu-lated there? erom1 and keying? 'pare guided-'in' said erst f z.conductor,l a spring 'inserted betvvee'enA said rst and second conductors, a. third conduct'or' "in said ,crosshead' insulated therefrom-.

.1and;electrically.connectedwith the other'tere l inimtlef'said incandescent lamp, and a cam., "l v :on saidthird conductor Iadaptedftordepress fand' release 'said second 'conductor on said l -rofsshead-@yvith said incandescent' lamp being.

trned in eitlzuerdirection;v

3." fan electric'- *safety-#lamp,` the-'combination-- with' a'box, Vofv a 'handle tur-hable on .said box,l afstorage .batteryin ysaidbox, ftwo supports-fon said ,box, one hollow and the other; solid and :electrically connected.y with.l

f one 'p0leoffsa'id storage battery, ai crosshead .-tiirnable/ i-n. said two .'supports, an incandescentfla'mp" in said crosshea'd'. and 'having its' j onefterzni'nal electrically connected by said crosshead-"with said solid support, a conductor longitudinally movablein and insu#l Vlated from said hollow 'support-and elec` triest-1157 Connected with .the other-pole of saidl storage.battery,` a Asecond conductor 1n said crosshead insulated thereroinand electrically connected with the other' terminal ofsaid incandescent lamp, a cam'on said secondl conductor i adapted to depressand release v :said conductor on said crosshead 'v'vith' said incandescent lamp being turned in either fidirection, a protecting glass-bell von-y said crosshead'- coveringnsaid incandescent lamp, and a device on. said crosshead or-connect-- jing therewith anadiseoncting said protecting glass-bell, said handle' being adapted lto lock in its vertical position'said device.

lothe'i` solid andl electrically connected Withone pole of said storage battery, a crosshead 'tri'rnablen said tvvo supports, an iI'1candes-- cent lamp` said crosshead and having its one terminal 'electrically connected .by said crossheadwith said solid support, a con# d uctor longitl'idinall movable, inv and ins1i A lated from-said hoow support and -elec-rv -`trically connected with the other pole of said storage battery, a second conductor 4in ysaid c ros she ad insulated therefrom and electri-- flcally connected lwith vthe other terminal of'.

said lvincandescent lamp, a cam on-said second conductorad'aptedto depress and release said conductor .on -said ,crossheadwith said incandescent lamp being turned in either di- -recti on, a'protecting glassfbell on said cross- I head covering said incandescent lamp, and a' device on said crosshead for' connecting ther'evvithand disconnecting said 'protectingv 'glass-bell, said' handle being adapted to lock in its .vertical vposition said device.

BRUNofcnRIsTiANsEN'.-

, YBessin 

